:root {
  --bg: #12131c;
  --panel: rgba(18, 19, 30, 0.82);
  --line: rgba(255, 255, 255, 0.09);
  --text: #e7e6ef;
  --dim: #9a98ad;
  --accent: #f0b06a;
  --cobalt: #3d6cf0;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif; }
body { display: flex; flex-direction: column; overflow: hidden; }

#stage { position: relative; flex: 1; min-height: 0;
  background: linear-gradient(#22325e, #4a5a8f 40%, #f0b38a 75%, #2a2540 76%); }
#stage canvas { display: block; position: absolute; inset: 0; }
#loading { position: absolute; inset: 0; display: grid; place-items: center; color: var(--dim); }
body.ready #loading { display: none; }
#error { position: absolute; left: 16px; right: 16px; top: 16px; padding: 12px 14px;
  background: #3a1820; border: 1px solid #7a2c3a; border-radius: 8px; }

#debug { position: absolute; top: 12px; left: 12px; max-width: min(460px, calc(100% - 24px));
  padding: 10px 12px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  font: 12px/1.5 ui-monospace, "SF Mono", Menlo, monospace; backdrop-filter: blur(6px); }
#debug b { color: var(--dim); font-weight: 500; margin-right: 4px; }
#debug .dim { color: var(--dim); }
#debug .warn, #debug .q { color: var(--accent); }
#debug .tier-production { color: #7fd99a; }
#debug .tier-candidate { color: var(--accent); }

#controls { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; justify-content: space-between;
  padding: 10px 16px; background: var(--bg); border-top: 1px solid var(--line); }
.group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
button { font: inherit; color: var(--text); background: #232536; border: 1px solid var(--line);
  border-radius: 999px; padding: 7px 14px; cursor: pointer; }
button:hover { background: #2c2f45; }
button:focus-visible, summary:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary { background: linear-gradient(#3d6cf0, #2c4fc0); border-color: transparent; }
button.primary:hover { background: linear-gradient(#4b78f5, #3359cc); }
button.quiet { background: transparent; color: var(--dim); }
.speed { display: flex; align-items: center; gap: 8px; color: var(--dim); }
.speed input { width: 110px; accent-color: var(--accent); }
.speed output { min-width: 44px; color: var(--text); font-variant-numeric: tabular-nums; }
.state { color: var(--dim); font-size: 13px; min-width: 120px; text-align: right; }
details { position: relative; }
summary { cursor: pointer; color: var(--dim); list-style: none; padding: 6px 10px; border-radius: 6px; }
summary::-webkit-details-marker { display: none; }
details[open] summary { color: var(--text); }
.menu { position: absolute; right: 0; bottom: calc(100% + 8px); z-index: 5; display: grid; gap: 6px;
  padding: 10px 12px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  backdrop-filter: blur(6px); white-space: nowrap; }
.menu a { color: var(--accent); text-decoration: none; }

@media (max-width: 720px) {
  #controls { padding: 8px 12px; gap: 6px 8px; }
  button { padding: 6px 11px; font-size: 13px; }
  .state { display: none; }
  .speed input { width: 80px; }
}